How to get three stars on angry birds space wold 1 level 17
Another level, another three stars. Shoot the first bird towards the upper left corner of the cluster with the blinking red lights. As it gets there press on your screen to set it of. This will blow a lot of the concrete blocks into some of the pigs. I got left with just the one. All you have to do now is pick of any stray pigs with the last two birds. The trick to getting your three stars here is to take out enough of the rubble before all the pigs are gone.
A video of the whole thing can be seen below.